[serializer] API to re-use global proxy in v8::Context::FromSnapshot.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 7877 matching lines @@
    * template. The state of the global object will be completely reset
    * and only object identify will remain.
    */
   static Local<Context> New(
       Isolate* isolate, ExtensionConfiguration* extensions = NULL,
       MaybeLocal<ObjectTemplate> global_template = MaybeLocal<ObjectTemplate>(),
       MaybeLocal<Value> global_object = MaybeLocal<Value>());
 
   /**
    * Create a new context from a (non-default) context snapshot. There
-   * is no way to provide a global template or global proxy since the
-   * context snapshot already contains a global proxy.
+   * is no way to provide a global object template since we do not create
+   * a new global object from template, but we can reuse a global object.
    *
    * \param isolate See v8::Context::New.
    *
    * \param context_snapshot_index The index of the context snapshot to
    * deserialize from. Use v8::Context::New for the default snapshot.
    *
    * \param extensions See v8::Context::New.
+   *
+   * \param global_object See v8::Context::New.
    */
 
   static MaybeLocal<Context> FromSnapshot(
       Isolate* isolate, size_t context_snapshot_index,
-      ExtensionConfiguration* extensions = nullptr);
+      ExtensionConfiguration* extensions = nullptr,
+      MaybeLocal<Value> global_object = MaybeLocal<Value>());
 
   /**
    * Returns an global object that isn't backed by an actual context.
    *
    * The global template needs to have access checks with handlers installed.
    * If an existing global object is passed in, the global object is detached
    * from its context.
    *
    * Note that this is different from a detached context where all accesses to
    * the global proxy will fail. Instead, the access check handlers are invoked.
@@ skipping 1745 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_